阿尔芬波总磁场存在漂移趋势时磁通门磁强计在轨标定的优化方法  

An optimal method for in-flight calibration of the fluxgate magnetometer when the total magnetic field of Alfvén waves has a drift trend

作　　者：程甚男 王国强 潘宗浩[2] 孟立飞[3] 易忠[3] 张铁龙 CHENG ShenNan;WANG GuoQiang;PAN ZongHao;MENG LiFei;YI Zhong;ZHANG TieLong(Institute of Space Science and Applied Technology,Harbin Institute of Technology,Shenzhen 518055,China;Department of Geophysics and Planetary Science,University of Science and Technology of China,Hefei 230026,China;Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;Space Research Institute,Austrian Academy of Sciences,Graz A-8042,Austria)

机构地区：[1]哈尔滨工业大学(深圳)空间科学与应用技术研究院,深圳518055 [2]中国科学技术大学地球和空间科学学院,合肥230026 [3]北京卫星环境工程研究所,北京100094 [4]奥地利科学院空间研究所,格拉茨A-8042

出　　处：《地球物理学报》2022年第5期1558-1570,共13页Chinese Journal of Geophysics

基　　金：国家自然科学基金(41804157,41774171,41974205,41774167和41904156);高等学校学科创新引智计划(B18017);中央高校基本科研业务费专项资金资助.

摘　　要：高精度的磁场测量对深空探测具有重要意义,然而卫星上磁通门磁强计的磁补偿值会随着时间缓慢变化,需要进行在轨标定.近期,一种新的在轨标定方法被提出,即Wang-Pan方法.该方法发现阿尔芬波动存在一个线性度高的最优补偿曲线,利用多个波动的最优补偿曲线可计算出磁强计的磁补偿.然而,该方法没有考虑所选波动事件的总磁场存在漂移趋势的情况.本文通过数值分析,发现阿尔芬波总磁场存在漂移趋势时最优补偿曲线会偏离真实的磁补偿值,甚至不再具有较高的线性度,从而产生计算误差;将该漂移趋势去除之后,可显著降低Wang-Pan方法的计算误差.我们利用金星快车的磁场数据验证了该优化方案的可行性.本文的研究成果有助于将Wang-Pan方法应用于地球磁层卫星.High-precision magnetic field measurement is of great significance for deep space exploration.However,the zero offset of the fluxgate magnetometer on the satellite will change slowly with time,which requires in-flight calibration.Recently,a new in-flight calibration method has been proposed,namely the Wang-Pan method.It is found that there is an optimal offset line with a high linearity in the offset cube for an Alfvén wave,and the zero offset of magnetometer can be calculated by using the optimal offset lines of several Alfvén waves.However,this method does not take into account the drifting tendency of the total magnetic field of the selected events.Based on numerical analysis,we found that the optimal offset line will be far away from the real zero offset and even no longer has a high linearity if the total magnetic field of the Alfvén wave has a drift trend,which results in calculation errors.Nevertheless,the calculation error of the Wang-Pan method can be significantly reduced after removing such a drift trend.We verify this optimal method by using the magnetic field data obtained from the Venus Express.The results of this paper will be helpful for the application of the Wang-Pan method to the terrestrial magnetospheric satellites.

关 键 词：磁通门磁强计 在轨标定 阿尔芬波动 磁补偿 

分 类 号：P353[天文地球—空间物理学]